layout: Remove clearance parameter from BoxFragment::new() (#37921)

Clearance only applies to block-level boxes, so it was unnecessary to
require it as a parameter. Instead, in block layout we can set it using
the new `.with_clearance()` method.

Testing: Unnecessary (no behavior change)

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

components/layout/flow/inline/line.rs

@@ -459,7 +459,6 @@ impl LineItemLayout<'_, '_> {
             padding.to_physical(ifc_writing_mode),
             border.to_physical(ifc_writing_mode),
             margin.to_physical(ifc_writing_mode),
-            None, /* clearance */
             None, /* specific_layout_info */
         );